Read the following passage and see if you can decide whether to use the singular or the plural form of the words/phrases provided.
Participating fully in a group discussion [
1a. require
1b. requires
] practice in the skills of talking clearly and concisely, asking useful [
2a. question
2b. questions
] and listening carefully. These skills [
3a. take
3b. takes
] time to acquire particularly with a group of people who initially are [
4a. stranger
4b. strangers
], ....
Part II